页岩油油气可动性测井响应特征分析及应用
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蒋云箭(1966—),男,江苏泰兴人,高级工程师,硕士,从事测井解释管理与研究工作。E-mail:jiangyj750.slyt@sinopec.com

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Analysis of hydrocarbon movability logging response features of shale oil and its applications
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    摘要:

    页岩油测井评价是目前测井解释的难点之一。从页岩油具有“自生自储”和“生烃高压”的成藏特征,以及地质“甜点”具有异常高压和油气显示活跃等宏观现象出发,深入分析了页岩油地质“甜点”的基本特征,指出油气可动性是页岩油地质“甜点”的最重要特征。统计胜利油区数百口页岩油井的钻井、录井、测井和试油等资料,发现地质“甜点”段物性较好、地层高压、油气充注度高,井壁附近更易形成明显而稳定的电阻率低侵特征剖面。由于双侧向测井比感应测井更能有效地表征低侵特征,首次从宏观上确立了页岩油油气可动性与测井曲线之间的响应关系。基于双侧向测井曲线幅度差异特征,提出了应用油气可动性定量评价系数评价页岩油地质“甜点”的方法。应用该方法对多口页岩油井进行了地质“甜点”分级评价,评价结果与岩相分析和试油结果吻合度较高,获得了良好的应用效果。

    Abstract:

    Well logging evaluation for shale oil is one of the difficulties in logging interpretation at present. Based on the accumulation characteristics of shale oil such as“self-generation and self-storage”and“high pressure for hydrocarbon generation”,as well as the macro phenomena of geological“sweet spots”such as the abnormal high pressure and active oil and gas display,authors analyze the essential characteristics of shale oil“sweet spots”and consider that the hydrocarbon movability is the most important characteristic of the geological“sweet spots”of shale oil in this study. The statistical results of the drilling,mud logging,well logging and oil testing data from hundreds of shale oil wells in Shengli Oilfield show that the geological“sweet spot”intervals have good physical properties,high formation pressure and high oil and gas charging, which make it easier to form obvious and stable low resistivity invasion profile near the borehole. Since the dual lateral logging is more effective to show the low invasion feature than the induction logging,the response relationship between the hydrocarbon movability of shale oil and well logging curves is established for the first time. Based on the amplitude difference of dual lateral logging,the quantitative evaluation coefficient of hydrocarbon mobility is proposed to evaluate the geological “sweet spots”of shale oil. The grading evaluation of geological“sweet spots”for several shale oil wells is conducted by this method,and the results match well with the lithofacies analysis and oil test results,which indicate a good application performance.

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蒋云箭,刘惠民,柴春艳,辛忠斌.页岩油油气可动性测井响应特征分析及应用[J].油气地质与采收率,2020,27(5):44~52

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  • 在线发布日期: 2020-11-25
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